Finishing textile goods.



alwa s @UNITED STATES PATENT OFFICE.

PAUL KRAIS, OF ILKLEY, ENGLAND, ASSIGNOR TO THEBRADFORD DYERSASSOCIATION LIMITED, OE BRADFORD, ENGLAND.

Specification 01 Letters Patent.

Patented Nov. 6, 1906.

Application filed March 6, 1905. Serial No. 248,760.

-To all whom'it may concern.-

Be it known that 1, PAUL KRAIS, Ph. D., a subject of the German Emperor,residing at 5 Easby drive, Ilkley, En land, have invented certain newand usefu Improvements in Finishing Textile Goods, of which thefollowing'is a specification. Certain classes of piece goods have for along time been passed between rollers engraved with fine parallel linesin order to give them a silk-like gloss or luster, which is commonlyknown as Schreiner finish. The gloss or luster produced by suchmechanical means is, however, fugitive, being more or less lost when thegoods are exposed to a moist atmosphere or to rain or to the tailorsiron. For many years past efforts have been made to render suchmechanical finishes ermanent, and manypro'cesses have been tried; but upto the present time only a very partial success has been obtained. Forexample, it hasbefore been proposed to render gzrmanent the finishproduced b the hreiner rolls .by treating the o s with differentsolutions of n1trocel ulose; but hitherto for various reasons suchprocesses have not roduced wholly satisfactory results. It as beenascertained that this is attributable to the character of the solventswhich have been employed.

With some solvents the moisturewhich is resent inv the fabrics causesthe ni troce lu ose to be deposited in an opaque theappearanceo theinstead of a tran arent form, thus changing oods. Some solventsarehi'ghly inflammabfe and explosive when their vapors are mixed withair, and are therefore dangerous. Some solvents act as anesthetics, andare therefore dangerous to the life and health of the workman. Somesolvents impart to .the goods a disagreeable smell. Some solvents havetoo high and others too low a boiling-point to render their use easy,and so on.

After a long series of experiments and after trials'of almost all knownand many hitherto unknown solvents one has at len h been covered whichis free from all 0 the aboveis a matter of great importance.

named objections. This solvent is am lfor-- mate, (the formic-acid etherof isoamy alcohol.) Its use is free from danger, it does not render thenitrocellulose opaque, and it has a comparatively high but not too higha boiling-point, (about 124 centigrade.) The solution also is veryfluid, and consequently it is possible to roduce extremely thin films orcoatings on t e fibers ofthe fabric, which A five-percent. solution issuitable, and it ma be applied to the fabric in any of the usua ways orexample, by slpraying. The solution is preferably app ie solvent beingevaporated after each a lication; but theresulting coating should notform a complete skin, nor should it waterproof the fabric, but be merely'ust sufficient tofix the mechanically-produce luster finish.

What I claim is-.

v 1. The process herein described of finishing textile goods whichconsists in coating twice in succession, the

them'with a thin solution of nitrocellulose in amyl formate and thenevaporatin the amyl formate, substantially as describej.

2. The process ing textile oods which consists in producing a silk-likeuster or gloss thereon, and then rendering this gloss or lusterpermanent without changing the "appearance of the goods herein describedof finish- I and without imparting a disa eeable odor thereto bycoatinthe goods with a solution 'of.nitrocellulose 1n amyl formate and' thenevaporating the amyl formate.

3. The process herein described of,fini-shin'g textile. goods whichconsists in passing them between engraved rollers, then coating thegoods with a solution of nitrocellulose in amy formate, and thenevaporating the amyl formate thereby fixing orrendering permanent thefinish produced by the rollers without forming on the goods an opaqueskin or imparting a disagreeable odor thereto.

I PAUL KRAIS. Witnesses:

I. SINGER,

G. Gn nna'r Tnourson.

